Biology Quote by Robert M. Sapolsky

“Phenotype, in short, drags genotypes behind it, like a cart pulling a horse. It is the perennial conundrum of natural selection that it seeks…

— Siddharta Mukherjee

As a consequence, geneticists described evolution simply as a change in gene frequencies in populations, totally ignoring the fact that evolution consists of the…

— Ernst Mayr

For me, the level at which natural selection causes the phenomenon of adaptation is the level of the replicator - the gene.

— Richard Dawkins

It is an error to imagine that evolution signifies a constant tendency to increased perfection. That process undoubtedly involves a constant remodeling of the…

— Thomas Huxley

We may consequently state the fundamental theorem of Natural Selection in the form: The rate of increase in fitness of any organism at any…

— Ronald Fisher

Trait X is fitter than trait Y in a population of organisms if those organisms have other biological traits T and live in an…

— Elliott Sober

The essence of Darwinism lies in its claim that natural selection creates the fit. Variation is ubiquitous and random in direction. It supplies raw…

— Stephen Jay Gould

“If genes strongly influence average levels of a trait, that trait is strongly inherited. If genes strongly influence the extent of variability around that…

— Robert M. Sapolsky

“I am suggesting here that organisms have a built-I capability of adapting to their environment. I am suggesting that to the extent that evolution…

— Lee Spetner

When a trait is universal, evolutionary biologists look for a genetic explanation and wonder how that gene or genes might enhance survival or reproductive…

— Robin Marantz Henig

Evolution thus is merely contingent on certain processes articulated by Darwin: variation and selection.

— Ernst Mayr

“With the little changes that happen with reproduction, the configuration of your DNA and your genes can change for you and others in the…

— Bill Nye